Drawbar



W. L. ZINK DRAWBAR March 3, 1942. 2,2 7%,768

Filed Feb. 15, 1959 2 Sheets-Sheet 1 William L. Zink INVENTORY ATTORNEY.

W. L. ZINK March 3, 1942.

DRAWBAR Filed Feb. 15, 1939 2 Sheets-Sheet 2 William L. Zink.

INVENTOR.

BY mea (1 mm ATTORNEY.

Patented Mar. 3, 1942 UNE'EE STATES FATEN'? DRAWBAR William L. Zink, Plano, 111., assignor to Sears, Roebuck and 00., Chicago, 111., a corporation of New York Claims.

This invention relates generally to agricultural implements, and more particularly to draw-bars for use in connection with drag harrows.

One of the principal objects of this invention is to provide an improved draw bar which is adapted for use with different commercial makes of drag barrows as well as different numbers of units of harrows, so that the outer end-s of the draw-bar will not project beyond the outer sides of the harrows attached thereto.

Another important object of this invention is to provide an improved adjustable draw-bar which is relatively simple in construction, light in weight, and easily manipulated.

A further object is to provide a novel adjustable draw-bar having an improved structure, and adjustability of runners associated therewith.

Other objects and advantages will be apparent from the following description, reference being had therein to the accompanying drawings, in which:

Figure l is a top plan view of a draw-bar embodying the principles of this invention;

Figure 2 is a vertical sectional detail view taken along the line 2-2 of Figure 1;

Figure 3 is a horizontal sectional view taken along the line 3-3 of Figure 2;

Figure 4 is a top plan view of the draw-bar similar to Figure 1, showing certain elements of the draw-bar in alternative positions;

Figure 5 is a vertical sectional detail View taken along the line 5-5 of Figure 4; and

Figure 6 is a vertical sectional view taken along the line 66 of Figure 4. I

Referring to the drawings, a draw-bar embodying the present invention and referred to generally by the reference character it comprises a cross-bar or beam l2 and a pair of extension bars or beams M adjustably connected with the end portions of the cross beam 52. The cross beam l2 and the extension'bearns M are preferably formed of structural angle members, the extension beams being disposed within the angle of the cross beam. Both the cross beam and the extension beams are provided with a plurality of bolt holes therein for receiving bolts IS whereby the extension beams may be fixedly connected to the cross beam and may also be adjustably positioned relatively to the cross beam.

Draft bars l8 are also preferably constructed from structural angle bars and are positioned at an angle of substantially forty-five degrees with respect to the cross beam I2. The rear ends of the draft bars 18 are fixedly secured to gusset plates 2!) which, in turn, are secured to the cross beam 12 by certain of the bolts 16 which also serve to connect the extension beams M to the cross beam It. The front ends of the draft bars it are secured to a connecting plate 22, Figure 6, by bolts 24 and are also secured to a clevis 26 by means of bolts 28. A brace bar 30 preferably formed from a structural channel bar is associated with each of the draft bars l8 and the adjacent extension bar M, and has one end fixedly connected to the draft bar H8 at an intermediate point thereof by means of a bolt 3! and the other end connected to the extension bar 14 by a bolt 32. The extension bar I4 is provided with a plurality of holes 3% therein for receiving the bolt 32, which contribute to the adjustability of the extension bar M relatively to the fixed bar I2 and the brace bar 30.

A brace bar 36 also preferablyformed from a structural channel bar has the ends thereof fixedly connected to the draft bars l8 by bolts 38 at intermediate points thereof, the bolts 38 being positioned adjacent to the bolts 3! for connecting the brace bars 36 to the draft bars 18. A pair of auxiliary brace bars 46 is also provided for connecting the intermediate portions of the draft bars E8 to the mid-portion of the fixed bar E2. The brace bars it have ends secured to the draft bars 18 and the brace bar 36 by the bolts 38 and their other ends secured to the intermediate portion of the fixed bar it by bolts 42.

From the above description it will be seen that the draw-bar H3 is so constructed and the elements thereof so arranged thatthe strain and stresses exerted on any of the several members will be distributed over the whole structure.

As best shown in Figure 1 of the drawings, runners M are connected to the cross beam l2 and the extension beams it on the lower sides thereof for supporting the draw-bar when it is being drawn so that the draw-bar will not drag on the ground. The runners M are so designed that weeds and vines will not accumulate thereon as they are pulled over the ground, and are provided with a novel structure for being connected to the bars l2 and M, as will hereinafter or drag harrows may be drawn at one time by the draw-bar l0. Each of the links 48 is provided with end eye portions, one of which is connected to an eye bolt 52 secured to a cross-bar 46, and the other fastened to an extension beam l4 or the cross beam l2 by a bolt 55.

The plurality of holes 34 and 54 in the extension beams [4, together with the plurality of holes 56 and 58 in the cross beam l2, provide for the links 48 being connected to the extension beams and the cross beam in the proper positions, so that the cross-bars 46 may be retained in aligned and spaced-apart positions regardless of their length. Different lengths of cross-bars 46 may be used, depending on the spacing of the links 50, to accommodate different commercial makes of implements or the number of implements desired to be pulled.

Figure 4 illustrates the adaptability of the draw-bar construction for use with shorter cross-bars 46' than those shown in Figure 1 for pulling a lesser number of implements. In shortening the over-all length of the cross beam I2 and extension beams M, as illustrated in Figure l, the bolts I6 and 32 are removed from the openings in which they are disposed in Figure 1, and the extension beams I4 moved to the positions as represented in Figure 4, after which the brace bars 38 and the gusset plates 2% secured to the draft bars l8 may again be fastened to the extension beams I4 by the bolts i6 and 32. The links 48 may also be shifted to the positions shown in Figure 4 in order that the draw-bar may exert an even pull on the cross-bars 45, and retain the relatively short cross-bars 46 in spacedapart and aligned positions.

Thus it will be noted that the draw-bar may be adapted for use with either relatively long or short cross-bars 46, 45, and that the draw-bar may be readily adjusted so that the ends of the draw-bar will not extend beyond the implements.

The outer runners 44 attached to the extension beams l4 may be shifted to different positions on the extension beams [4 by reason of the holes 3 3, as illustrated in Figures 1 and 4, in order that the runners may not ride over rows of the plants being cultivated. The intermediate runner 44, in like manner and for the same reason, may also be moved to alternative dotted line positions 44' on the fixed bar I2, as illustrated in Figure 4.

In Figure 1, the brace bars 40 are connected to the cross beam l2 by the bolts 42, and the intermediate runner 54 is positioned between the brace bars 40 and is connected to the cross beam l2 by other bolts.

In Figure 4:, however, bolts 68 are shown connecting both the brace bars 40 and the intermediate runner 44 to the cross beam l2, thereby leaving open the holes 42 in which the bolts 42 in Figure 1 were disposed, and making these bolts available for having the inner links 48 connected therewith if so desired.

Figures 2 and 3 best illustrate the structure for connecting the runners 4t to the beams i2 and I4. The runner it comprises a shoe portion 62 for engagement with the ground and a top portion 64 for being connected to the bar [2 or l4. The top portion t4'of the runner is provided with a pair of arcuate recesses 68 oppositely positioned in the edges thereof for receiving a pair of connecting bolts iii which extend through openings in a plate l2 positioned on the underside of the top portion 64, and corresponding openings in the beams 12 or l4.

The top portion of the runner 64 is securely clamped between the plate 12 and the bar l2 or I4, which distributes the strain on the connected portion of the runner and tends to prevent the top portion 64 of the runner breaking at the minimum width of the top portion between the recesses 68.

This construction enables a more narrow runner to be utilized, with a consequent saving of material, than would otherwise be necessary if the runner were provided with full bolt openings for being connected to the draw-bar, and the runner is prevented from turning as effectively by the bolts It! being disposed in the recesses 68, as would result from the bolts extending through full bolt openings in the runner I claim:

1. A draw-bar of the character described comprising a cross beam, extension beams connected to the ends of the cross beam, draft arms connected to the ends of the cross beam, and brace members connected to the draft arms and the ends of the extension beams, said extension beams being provided with a plurality of openings therein for being adjustably positioned relatively to the cross beam and the brace members.

2. A drawbar comprising a crossbeam, extensible beams connected to the ends of the crossbeam, draft arms having their rear ends connected to the ends of the crossbeam and their front ends connected together, and brace members connected to the outer ends of the extensible beams and intermediate portions of the draft arms.

3. A drawbar comprising a crossbeam, extensible beams connected to the ends of the crossbeam, draft arms having their rear ends connected to the ends of the crossbeam and their front ends connected together, brace members connected to the outer ends of the extensible beams and intermediate portions of the draft arms, and a tie member connected to the intermediate portions of the draft arms.

4. A drawbar comprising a crossbeam, extensible beams connected to the ends of the crossbeam, draft arms having their rear ends connected to the ends of the crossbeam and their front ends connected together, brace members connected to the outer ends of the extensible beams and intermediate portions of the draft arms, a tie member connected to the intermediate portions of the draft arms, and auxiliary tie members connected to the intermediate portions of the draft arms and an intermediate portion of the crossbeam.

5. A drawbar comprising a crossbeam, extensible beams connected to the ends of the crossbeam, draft arms having their rear ends connected to the ends of the crossbeam and their front ends connected together, brace members connected to the outer ends of the extensible beams and intermediate portions of the draft arms, and common means for connecting the extensible beams and the draft arms to the crossbeam.

6. A drawbar comprising a crossbeam, extensible beams connected to the ends of the crossbeam, draft members connected to the ends of the crossbeam, brace members connected to the draft members and the extensible beams, and fastening means for adjustably connecting the extensible beams to the brace members, the draft members and the crossbeam, whereby said extensible beams may be adjustably positioned relatively thereto.

7. A drawbar of the character described comprising a crossbeam, extensible beams connected to the crossbeam, draft members connected to the crossbeam, and common fastening means for connecting the extensible beams and the draft members to the crossbeam.

8. In an implement structure of the character described, a beam, clamping plate connected to the beam, a runner having a portion extending between the clamping plate and the beam, and a pair of fastening elements extending through the clamping plate and the beam on opposite sides of the runner portion, said runner portion being provided with recesses for receiving the fastening elements and being retained in a given position relatively thereto.

9. A draw bar comprising a cross beam, draft bars connected to said cross beam, brace bars connected to said draft bars and also to said cross beam, and a runner connected to said cross beam by the means connecting said brace bars to said cross beam.

10. A draw bar comprising a cross beam, draft bars connected to said cross beams, brace bars connected to said draft bars and also to said cross beam, and a runner connected to said cross beam by the means connecting said brace bars to said cross beam, said means comprising a clamping plate connected to said beam, said runner having a, portion extending between said plate and said beam, and a pair of fastening elements extending through said plate and said beam on opposite sides of said runner portion, said runner portion being provided with recesses for receiving said fastening elements and being retained in a given position relative thereto.

WILLIAM L. ZINK. 

